Integrating DMS with Snowflake for Real-Time Analytics in Real Estate

About the Client:

A diversified U.S. based real estate enterprise, our client manages a vast portfolio of residential properties across multiple states. Their business spans Build-to-Rent (BTR), third-party property management, real estate sales, and investment operations.

Background:

The client relied on siloed, on-premise databases (SQL Server, Oracle) for storing critical business data. As operations scaled, legacy systems struggled with performance, integration, and analytics. Client chose Snowflake as their cloud data warehouse and AWS DMS for seamless migration.

Challenge:

  • Complex Data Landscape: Data was spread across diverse on-premise databases and applications, each with different schemas, data types, and proprietary connectors. 
  • Minimizing Downtime: As a live operational business, the client could not afford extended downtime for their critical systems during data migration. A “lift and shift” approach was not feasible due to the continuous nature of real estate transactions and property management.
  • Data Integrity and Consistency: Ensuring the complete and accurate transfer of billions of records, including sensitive financial and tenant data, without loss or corruption, was a paramount concern. 
  • Resource Intensive and Error-Prone Manual Processes: Existing ETL processes were slow, error-prone, and hard to scale for large or continuous migrations.
  • Lack of Real-time or Near Real-time Capabilities: Batch-based methods couldn’t meet the need for near real-time insights on market and property performance.
  • Scalability for Future Data Growth: The solution had to support both initial bulk transfer and ongoing, scalable data synchronization as volume grew.

Solution:

Phased Migration to Snowflake Using AWS DMS

Phase 1: Assessment & Pilot

  • System Analysis: Identified high-impact tables and schema complexities.
  • Migration Planning: Designed hybrid flows—full loads for historical data, CDC for real-time sync.
  • Pilot Run: Migrated sample data to validate speed, accuracy, and process.

Phase 2: Full-Scale Migration

  • Historical Load: Ingested years of data into Snowflake staging via DMS full load.
  • CDC Sync: Enabled real-time updates (e.g., new tenants, leases, transactions) with minimal lag.
  • Schema Handling: Auto-adjusted pipelines to manage source schema changes seamlessly.
  • Monitoring: Deployed alerts and dashboards to track DMS task health and data integrity.

Phase 3: Transformation & Access

  • ELT in Snowflake: Built scalable transformations to produce analysis-ready datasets.
  • Validation Layer: Implemented automated checks to ensure data accuracy.
  • BI Enablement: Integrated Tableau and Power BI for near real-time reporting from Snowflake.

Outcome:

  • Zero Downtime Migration with no disruption to tenant operations or transaction processing
  • Real-time operational data, utilizing CDC-enabled pipelines, provided up-to-date snapshots of sales, leasing, and occupancy data
  • 60% decrease in engineering hours spent on manual ETL
  • Automated checks ensured consistency across source and target systems

Future-ready architecture with Snowflake’s scalability enables the easy integration of new data sources.

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